Abstract
We report measurements of magnetic avalanches in a Fe-Ni-Co alloy. The distribution of avalanche sizes is given by , with . The role of demagnetizing effects in the avalanche statistics is demonstrated. We analyze a simple model of interface growth and find a power law distribution of avalanche sizes over a wide range of parameters when an infinite-range demagnetization field is included. The exponents agree with those found at the critical field in the absence of demagnetization effects.
- Received 30 November 1994
DOI:https://doi.org/10.1103/PhysRevLett.75.276
©1995 American Physical Society